Remote access software

Not so much a problem, just looking for advice. I was looking for and downloaded some Remote access software, basically i wanted to be able to access my daughters computer and help her with any problems. ( she lives away from home ) I found and downloaded "TeamViewer". It is absolutely brillaint, worked first time, "does exactly what it says it does on the tin". Now my only concern is, has it opened up any ports (or whatever) that could render myself or my daughter to any unwanted attacks?